车辙深度对沥青路面结构性能影响性分析  

Influence of rutting depth on asphalt pavement structure performance

作　　者：刘刚[1] 陈磊磊[1] 钱振东[1] 陈道燮 LIU Gang;CHEN Leilei;QIAN Zhendong;CHEN Daoxie(Intelligent Transportation System Research Center,Southeast University,Nanjing 211189,China)

机构地区：[1]东南大学智能运输系统研究中心,南京211189

出　　处：《振动与冲击》2021年第24期36-40,共5页Journal of Vibration and Shock

基　　金：国家重点研发计划(2018YFB1600300,2018YFB1600304);江苏省研究生科研与实践创新计划项目(KYCX21_0133);东南大学优秀博士学位论文培育基金项目。

摘　　要：对不同车辙深度对路面结构性能的影响进行了理论分析。通过力学模型和数值模拟等手段分别分析了不同车辙深度下车辆冲击荷载和面层厚度对路面结构内部力学响应和性能衰减的影响机理。结果表明:车辙深度在0~10 mm内,车辙深度变化对路面结构冲击荷载响应的影响较大,冲击荷载效应对车辙深度变化的敏感性强,底基层层底疲劳寿命下降较快;车辙深度在0~5 mm内,冲击荷载效应最为明显,基层层底容易出现弯拉破坏。且荷载作用局部范围内的变形量和层底拉应力比离荷载作用区域较远的值大很多,随着离荷载作用面距离的增大而急剧减小。因此应控制沥青路面早期车辙的发展,及时采取罩面等预防性养护措施。从避免基层层底出现弯拉破坏的角度,早期车辙养护深度宜控制在5 mm之内;从底基层层底疲劳寿命维持的角度,早期车辙养护深度宜控制在10 mm之内。The influence of different rutting depth on asphalt pavement structure performance was studied theoretically.Through modeling and numerical simulation,the effect mechanism of vehicle impact load and thickness of asphalt layer on the internal mechanical response and performance degradation of pavement structure was analyzed respectively under different rutting depth.Results show that:when the rutting depth is in the range of 0-10 mm,the change of rutting depth has great influence on the impact load response of pavement structure,the effect of impact load is sensitive to the change of rutting depth,and the fatigue life of subbase course decreases rapidly.When the rutting depth is in the range of 0-5 mm,the impact load effect is the most obvious,bending and tensile failure is prone to occur in the bottom of base course.Besides,the deformation and tensile stress in the local range of load are much larger than those far away from the load area,and they decrease sharply with the increase of the distance from the loading surface.Therefore,the development of early rutting of asphalt pavement should be controlled and preventive maintenance measures such as overlay should be taken in time.From the perspective of avoiding bending and tensile failure at the bottom of base course,the early rutting maintenance depth should be controlled within 5 mm;from the perspective of maintaining the fatigue life of the subbase,the early rutting maintenance depth should be controlled within 10 mm.

关 键 词：车辙深度 路面结构性能 冲击荷载 力学响应 性能衰减 预防性养护 

分 类 号：U416[交通运输工程—道路与铁道工程]